Throttle control for outboard motors



Feb. 10, 1953 G. E. BUSKE 2,627,836

THROTTLE CONTROL FOR OUTBOARD MOTORS Filed May 4, 1951 4 Sheets-Sheet l INVEN TOR.

Gil 66/? if. 314451456 Feb. 10, 1953 G E. BUSKE 2,627,836

THROTTLE CONTROL FOR OUTBOARD MOTORS Filed May 4, 1951 4 Sheets-Sheet 2 INVENTOR.

Gilbcr'fi Zi'BusAfe Feb. 10, 1953 G. E. BusKE 2,627,836

THROTTLE CONTROL FOR OUTBOARD MOTORS Filed May 4, 1951 4 Sheets-Sheet 5 IN V EN TOR.

Gilberi' E Bus/re BY M, WAM.

one position to the other.

Patented Feb. 19, 1953 THROTTLE CONTROL FOR OUTBOARD MOTORS Gilbert E. Buske, Anson Township, Chippewa County, Wis., assignor to National Pressure Cooker Company, Eau Claire, Wis, a corporation of Wisconsin Application May 4, 1951, Serial No. 224,574

10 Claims. 1

This invention relates to outboard motor units, and has to do with throttle controls for such units.

It is common practice in outboard motors to provide a magneto, usually housed within the engine fly wheel, including a stator plat-e turnable in either direction about the axis of the engine crank shaft by a control lever, this stator plate carrying a cam member cooperating with the carburetor throttle lever for opening and closing the throttle valve as required. The stator plate and associated parts impose substantial drag on the control lever which, for that reason, can not be shifted quickly for varying the speed of the motor and, therefore, is not sufliciently sensitive for effecting changes in speed on short notice, as frequently required in emergencies. It has been proposed to provide supplementary means for operating the throttle valve without necessity for shifting the control lever, so as to produce sensitive speed control. Such supplementary means as I am familiar with are, in general, rather complicated, interfere with adjustment of the throttle lever by the cam member of the stator plate and require that the operator be seated well at the stern of the boat.

My invention is directed to throttle control means supplementary to the usual control lever and Which avoids the objections above noted to the known supplementary throttle control means referred to. To that end, I provide a throttle control member mounted on the steering handle and movable from a normal position in throttle operating direction, this control member having op erating connection to the throttle valve by means 1 providing lost motion such that the throttle valve may be adjusted by the cam member of the stator plate without interference from the supplemen tary control means. The throttle control member is positioned at the forward end of the steering handle and normally projects forwardly therebeyond so that the operator may sit Well forward in the boat, as is desirable when traveling at high speed, grasping the forward end of the steering handle and, also, being able to control the throttle, and thereby control the speed of the boat, as desired. The steering handle is pivoted for movement about a horizontal axis to a raised position and a lowered position, means being provided for limiting such movement in either direction. The operating connections between the throttle control member and the throttle valve lever are such as to avoid any interference with movement of the handle from The throttle control member preferably is in the form of a button slidable in the forward end of the steering handle and is connected to the throttle lever by means enclosed, in major portion, within the steering handle so as to be guarded thereby against injury or fouling. Further objects and advantages of my invention will appear from the detail description.

In the drawings:

Figure 1 is a side view of an outboard motor unit embodying'the throttle control means of my invention;

Figure 2 is a fragmentary plan view of the power head of the unit of Figure 1, with the hood or shroud removed, showing the forward portion only of the power head, with the steering handle broken away;

Figure 3 is a front view of the power head of Figure 2, with the steering handle in raised position;

Figure 4 is a plan sectional view of the steering handle and its mounting bracket, the bracket being broken away and shown partly in plan;

Figure 5 is a sectional view, on an enlarged scale, taken substantially on line 5-5 of Figure 4;

Figure 6- is a sectional view, on an enlarged scale, taken substantially on line 8- 5 of Figure 4;

Figure 7 is a plan view, on an enlarged scale, of the carburetor and the throttle lever and one end portion of the stator plate cam member, the latter being shown in about half-open throttle position;

Figure 8 is a side view, on an enlarged scale, of the throttle lever, showing the carburetor stack in section and the throttle valve in fully closed position; and

Figure '9 is a view like Figure 8 but with the throttle valve in full open position.

The throttle control means of my invention may, in its broader aspects be applied to any suitable outboard motor unit. I have shown it, by way of example, as applied to an outboard motor unit comprising a motor support tube l5 mounted for turning movement in a sleeve it carried by a stern clamp I? for mounting the unit on the transom of a boat in a known manner. An intermediate housing I8 is secured on the lower end of tube [5 and carries at its lower end a gear case 19 enclosing the gearing for driving the propeller 2i], and a water pump, as is known. A mounting plate 2| is secured upon the upper end of tube l5 and an internal combustion engine or motor 22 seats on and is bolted to plate 2!, The motor 22 preferably, though not necessarily, is similar to the motor disclosed in my Patent No. 2,494,742,

issued January 17, 1950. An open work bracket 23 is secured to motor 22 and extends horizontally outboard thereabout. A sectional hood or shroud is removably mounted to the bracket 23 beneath it and encloses the motor 22 and its accessories. The bracket 23 carries a fuel tank 24 with a pull type of starter 25 having a pull rope or lanyard to the outer end of which is suitably secured a pull knob 26.

As is shown more clearly in Figures 2 and 3, a ratchet wheel 2! is secured on the upper end of crank shaft 28 of motor 22 for cooperation with a member of the starter 25. A notched disc 29 is secured on crank shaft 28 between ratchet wheel 21 and fiy wheel 30, also secured on shaft 28. The disc 29 may be used, with a pull rope or lanyard, for starting in emergencies, in case the starter 25 is broken or otherwise rendered ineffective. Pull starters cooperating with a ratchet wheel secured on the motor crank shaft, and notched discs for emergency starting, are known and further description thereof is unnecessary.

The fly wheel 30 is of cupped formation and houses a magneto comprising a stator plate 32, as is known. A control lever 33 is pivoted at 34 on bracket 23 and extends forwardly through a slot or opening 35 between tank 34 and bracket 23. The lever 33 is provided at its forward end with an upwardly extending hand grip or handle 36 for convenience in operating it. Lever 33 is also provided with an arm 3! extending forwardly from pivot 34 and connected, at its forward end, by a link 38, to an angle bracket 38a secured to and extending downward from the stator plate 32. This plate 32 may be turned in either direction about the axis of shaft 28, by the control lever 33, for starting the motor 22 and controlling the speed thereof, as is known.

A cam member 42, of generally arcuate shape in plan, is mounted on the stator plate 32 by angle brackets 43 secured thereto and extending downward therefrom. The cam member 42 extends forwardly from the stator plate and is disposed to contact an arcuate cam element 44 at the upper end of a throttle valve lever 45 secured, at its lower end, to the upper end of shaft 46 of a throttle valve 4'! rockably mounted in stack 48 of a carburetor 49 bolted to crank case 53 of motor 22. The carburetor 49 may be of any suitable construction and, in the operation of motor 22, delivers a fuel-air mixture thereto, as is known.

The valve shaft 46 is urged in valve opening direction-clockwise as viewed in Figures 2 and 7by a torsion spring 52 disposed about shaft 46 beneath an angle finger 53 at the lower end of throttle lever 45. One end of spring 52 is hooked over the finger 53 and the other end thereof is hooked about a pin 54 secured in a boss 55 extending upwardly from the carburetor stack 48.

When the control lever 33 is in start position, shown in full lines in Figure 2, the cam member 42 holds throttle valve 4'! in about half-open position. By moving control lever 33 clockwise, as viewed in Figure 2, toward slow position, throttle valve 41 is moved by cam member 42 in closing direction. When control lever 33 is moved in counterclockwise direction, as viewed in Figure 2, beyond start position and to such an extent that the cam member 42 clears cam element 44 of throttle lever 45, throttle valve 41 is turned to full open position by the torsion spring 52, such opening movement of the throttle valve being limited by contact of finger 53 with the adjacent side-of boss 55. From what has been said, it will be seen that the control lever 33 is effective for adjusting the magneto stator plate and also adjusting the throttle valve, as required, in a known manner.

The throttle lever 45 is provided, adjacent its lower end, with a tab 58 extending rearwardly therefrom at an angle in underlying relation to the cam element 44. This tab 53 slidably receives the inner end portion af 3, flexible cable 59 slidable through a guide tube or sheath 60 the inner end portion of which is secured by a clip 6| to the under face of bracket 23 a short distance to one side of the carburettor 49. The sheath Gil curves downward from clip 5| and toward the right, as viewed in Figure 3, and passes into a hollow handle bracket 52 bolted to motor 22 beneath carburettor 49 and extending toward the right outward a short distance beyond motor 22. The sheath is secured to the top of bracket 62, a short distance from its outer end, by a clip 53. A stop member 64, in the form of a bead, is secured on the inner end of cable 59 and is disposed to contact tab 58 when the throttle valve 47 is in full open position, as indicated in dot and dash lines in Figure 2, throttle lever 45 being then free of cable 53 for movement independently thereof in closing direction by the cam member 42, as will be clear from the full or solid line positions of the parts shown in Figure 2.

The outer end of sheath 63 extends into a reduced tubular neck 65 at the rearward end of a steering handle 57 of substantially angular or L shape in plan. Neck 66 is mounted for turning movement through a bushing 58 in an inner annular shoulder 69 of bracket 52 at the outer end thereof. A brass washer '10 is disposed between the adjacent ends of bracket 62 and sleeve 57 and a second brass washer H, disposed about the inner end of neck 65, is confined between the inner end of shoulder 69 and a retaining snap ring 72 engaging in a circumferential groove in neck 55, restraining handle 61 against outward movement relative to bracket 62. The bushing 68 is provided with an opening accommodating a brass friction disc 13 held in pressure contact with neck 66 by a compression spring 74 confined between disc 13 and a screw 15 threaded into boss 76 extending outward from shoulder 69, the latter being suitably bored for reception of the spring '54. The handle 6'! is provided, adjacent neck 66, with two bosses TI and 18 projecting radially outward therefrom and disposed to contact a stop finger 79 projecting from the outer end of bracket '52. As will be understood, the bosses 5"! and i8 cooperate with finger 79 for limiting turning movement of handle 61 relative to bracket 62. When the boss l? is in contact with finger 19, the steering handle 57 is in its lowered substantially horizontal position extending forwardly from the motor, which is its normal operative position in the use of the unit. In Figure 2 the steering handle 67 is shown in its normal lowered position and in Figure 3 it is shown in its raised position in which boss 18 is in contact with finger 19. The disc i3 provides, in conjunction with the compression spring 74, friction means for retaining the handle 5'! in its raised position or in any desired intermediate position between fuliy raised and fully lowered positions.

The steering handle 6? preferably is of channel cross section for the major portion of its length, as shown in Figures 4, 5, and 6, with the channel opening downward and being: closed by a, coyer plate 8|: (Figure 3): removably secured to the handle-by: screws 82: passing thQIGthI'OHgh and threading into bosses at: of the: handle.v The outer endiofr cable 59; extends. through neck 6d of handle 6? and; passes through a. slotted finger 8 1 extending downward from the rearward end of rear arm 85 of hell crank 861 pivoted at 81 in arm 61' adjacent the angle thereof; A stop member 88, in theform of'a bead, is clamped on cable 59- in contactvwi-th the outer-'facenof" finger 84. The: outer or forward: arm 8% of. bell crank 86 has anchored thereto the rearward end of a tension spring 38 the forward end of which is anchored to: a tab 9 l: integral with and extending downward-from top. wall 92 of handle 61'. Tensiorr spring 90- normally holds: bell crank, 86 in position with finger 8 3 in contactv with a stop finger 93- extending from the: adjacent side wall of handle 61:. At that time, the bead M is: disposed topermit full opening and closing move-- ments of the throttle valve under control of the cam member 42, as above noted.

The steering handle 63- is provided at its forward endwith a tubular extension or neck 95 and receives a suitably formed hand grip 96, preferably made of rubber or like material, fitting tightly about the outer end portion of handle 6? and extending therealong to a shoulder 9-! thereon, grip 95- covering the opening at theunder si'deof the handle extending from shoulder 91- to the extension or'neck 95. A button 98 is slidably mounted in neck 95 and projects a substantial distance therefrom forwardly beyond the grip 66. The button 9'8 is provided with a circumferential groove in-whichismoun-ted a ring-99 of a suitable plastic or-synthetic rubber-efiective for preventingany objectionable looseness of button 98 in neck- 95 while not presenting any appreciable frictional resistance to movement of button 93 in neck 95. The button 93 is secured on the forwardend of a substantially rigid operating rod I00 extending rearward through handle '61- and providedat its rearward end with a reduced stud I01 clamped by a screw H32 (Figure 6) in-a post H33 pivoted' on arm 89 of bell crank 86 at'the end thereof remote from pivot 81-.

When the button 38 is in its normal projected position, the throttle valve may be opened or closed any desired extent under control of cam member 32, without any interference from the supplementary'throttle control means comprising the button 93- andthe means connecting it to the throttle lever; On the other hand, when the throttle valve is in either fully opened or partially. opened position, it may be moved in closing direction, to any extent desired by; pushing the button-48 inwardly or rearwardly of steering-handie 61: and independently of the; cam member--42. By having the control button 98 at the forward endof. steering handle 61, the throttle valve may be operated by the thumb of the hand grasping thehandl'e or grip: 95 and the operator may therefjore, sit well forward-in the boat, which is, desirable when traveling at high speed; That is particularly important when approaching; or crossing the wake of another boat also traveling at high speed", in which case it is frequently necessary to quickly reduce the speed1of' the boat to avoid being swamped. By having-the control button at the forward end of the'steering handle loss of timein reachingback or changing position to operate a throttle control member is avoided and; in addition, by having the button control operable independently of "thestator plate-and the 6 cam member: carried. thereby, no; objectionable drag is imposed on. the: button: control whichfiis thereby rendered highly sensitive: assuring quick response to-anyinward pressure; exerted on; the controlabutton.

Itw-il-l beunderstood: that changes in detail may be. resorted to without. departing from. the; field and scope of invention, and I intend toinelude- 211T suchvariations', as fall within the scope on the; appended claims. in this application; in which the preferred form. only of. my invention has been disclosed.

li'clairnz.

1. In an outboard: motor-unit, a motor and, a carburetor therefor having a throttle valve yieldirgly urged: in opening direction, a. magneto stator plate movable in either direction about an: axis, a control lever connected to said: plate for moving the. latter, means for moving: said valve closing direction. comprising a cammember movable with said plate and unattached; to said. valve whereby the latter when open may be moved in. closing direction independently of said plate, a steering handle attached to said motor extending forwardly therefrom, a throttle control member on. said handle having anormal position and" movable therefrom in valve operating direction, and operating connections between said control member and said valve for moving thelatter in closing direction comprising a lost motion: connection having a stop disposed to permit operation of said valve by said cam member from full open to full closed position in the normal position of said control member and to move said valve in closing direction independently'of'said'cam member responsive to actuation of-said control member in valve operating direction.

2. Inan outboard motor unit; a motor and a carburetor therefor having a throttle valveyi'eldinglyurged in opening direction, athrottle lever for operating said valve, amagneto stator plate movable in either direction about an axis, a controllever connected to said plate for moving the latter; acam member carried by said plate coopcrating" with said throttle lever for opening and closing said valve and disposed to clear said throttle lever when saidplate is turned a predetermined distance in one direction, said cam member being unattached to said throttle lever whereby said valve when open may be moved in closingdi'rection independently of said plate, a steering handle attached to said motorextending forwardly therefrom, a throttle control button mounted on thefcr-wa-rdend of said handle slidable lengthwisethereof and yieldingly held in a normal forwa-rd projected position; and operating connections between said button and throttle lever comprising an operating member slidably connected to" said throttle lever and a stop on said operating-member spaced in the-normalpos-ition of said button from said throttle lever a distance to permit operation thereof from full closed to fullopen position under control ofsaid cam member and to pick upsaid throttle lever andmove-it in valve closing direction responsive to'rearward' movement of said button.

. 3; In an outboard motor unit, a motor and a carburettor therefor having a throttle valve 'yieldingl'y urged in opening direction, a throttle l'everfor operating said valve, a magneto stator plate movable in either direction about an axis, acontrol' lever connected to said platefor moving the latter, a cam membernmovable with-saidmlate disposed, toe contact; said.v throttle; lever for closing '7 said valve in the movement of said plate in one direction and to permit opening movement of said valve in the movement of said plate in the opposite direction, said cam member being moved clear of said throttle lever when said plate has been moved a predetermined distance in said opposite direction, said cam member being unattached to said throttle lever whereby said valve when open may be moved in closing direction independently of said plate, a steering handle at- 1' tached to said motor extending forwardly therefrom, a throttle control member at the forward end of said handle yieldingly held in a normal forward position and movable therefrom rearward, and operating connections between said control member and throttle lever comprising a lost motion connection to said throttle lever having a stop disposed to permit operation of said valve by said cam member from full open to full closed position in the normal position of said control member and to move said valve in closing direction independently of said cam member responsive to rearward movement of said control member.

4. In an outboard motor unit, a motor and a carburettor therefor having a throttle valve yieldingly urged in opening direction, a throttle lever for operating said valve, a magneto stator plate movable in either direction about an axis, a

control lever connected to said plate for moving the latter, a cam member movable with said plate disposed to contact said throttle lever for closing said valve in the movement of said plate in one direction and to permit opening movement of said valve in the movement of said plate in the 1 opposite direction, said cam member being moved clear of said throttle leverwhen said plate has been moved a predetermined distance in said opposite direction, said cam member being unattached to said throttle lever whereby said valve 11 when open may be moved in closing direction independently of said plate, a steering handle attached to said motor extending forwardly therefrom, a throttle control button slidably mounted at the forward end of said handle yieldingly held projected in a normal forward position and movable therefrom rearward, and operating connections between said button and said throttle lever comprising a member slidable through said throttle lever and provided with a stop disposed to permit full opening of said valve in the normal position of said button and to pick up said throttle lever and move it in valve closing direction in the rearward movement of said button.

5. In an outboard motor unit, a motor and a plate movable in either direction about an axis,

a control lever connected to said plate for moving the latter, a cam member movable with said plate disposed to contact said throttle lever for closing said valve in the movement of said plate in one direction and to permit opening movement of said valve in the movement of said plate in the opposite direction, said cam member being moved clear of said throttle lever when said plate has been moved a predetermined distance in said opposite direction, said cam member being unattached to said throttle lever whereby said valve when open may be moved in closing direction independently of said plate, a steering handle attached to said motor extending forwardly therefrom, a throttle control button slidably mounted .at th orward end of said handle yieldingly held projected in a normal forward position and movable therefrom rearward, and operating connections between said button and said throttle lever comprising a guide sheath and a flexible tension member slidable therethrough and through said lever and provided with a stop disposed t permit full opening of said valve in the normal position of said button and to pick up said throttle lever and move it in valve closing direction in the rearward movement of said button.

6. In an outboard motor unit, a motor and a carburettor therefor having a throttle valve yieldingly urged in opening direction, a throttle lever for operating said valve, a magneto stator plate movable in either direction about an axis, a control lever connected to said plate for moving the latter, a cam member movable with said plate disposed to contact said throttle lever for closing said valve in the movement of said plate in one direction and to permit opening movement of said valve in the movement of said plate in the opposite direction, said cam member being moved clear of said throttle lever when said plate has been moved a predetermined distance in said opposite direction, said cam member being unattached to said throttle lever whereby said valve when open may be moved in closing direction independently of said plate, a handle bracket attached to said motor, a steering handle pivoted to said bracket for limited movement to raised and lowered positions, said handle in its lowered position extending forwardly from said motor, a throttle control button slidably mounted at the forward end of said handle yieldingly held projected in a normal forward position and movable therefrom rearward, and operating connections between said button and said lever comprising a flexible member slidable through said throttle lever and provided with a stop disposed to permit full opening of said valve in the normal position of said button and to pick up said throttle lever and move it in valve closing direction in the rearward movement of said button.

7. In an outboard motor unit, a motor and a carburettor therefor having a throttle valve yieldingly urged in opening direction, a'throttle lever for operating said valve, a magneto stator plate movable in either direction about an axis, a control lever connected to said platefor moving the latter, a cam member movable with said plate disposed to contact said throttle lever for closing said valve in the movement of said plate in one direction and to permit opening movement of said valve in the movement of said plate in the opposite direction, said cam member being moved clear of said throttle lever when said plate has been moved a predetermined distance in said opposite direction, said cam member being unattached to said throttle lever whereby said valve when open may be moved in closing direction independently of said plate, a handle bracket attached to said motor, an angular steering handle pivoted adjacent its angle to said bracket for limited movement to raised and lowered positions, said handle in its lowered position extending forwardly from-said motor, an operating rod extending lengthwise of said handle into proximity to the angle thereof, a throttle control button secured on the forward end of said rod and slidable on the forward end of said handle. yielding means normally holding said rod and button in forward position, and operating connections between the rearward end of said rod and said throttle lever comprising a guide sheath and a flexible member slidable therethroughattached at One end to said rod and slidable at its other end through said throttle lever and there provided with a stop disposed to permit full opening of said valve in the normal position of said button and to pick up said throttle lever and move it in valve closing direction in the rearward movement of said button.

8. In an outboard motor unit, a motor and a carburettor therefor having a throttle valve yieldingly urged in opening direction, a throttle lever for operating said valve, a magneto stator plate movable in either direction about an axis, a control lever connected to said plate for moving the latter, a cam member movable with said plate disposed to contact said throttle lever for closing said valve in the movement of said plate in one direction and to permit opening movement of said valve in the movement of said plate in the opposite direction, said cam member being moved clear of said throttle lever when said plate has been moved a predetermined distance in said up posite direction, said cam member being unattached to said throttle lever whereby said valve when open may be moved in closing direction independently of said plate, a handle bracket attached to said motor, an angular steering handle pivoted adjacent its angle to said bracket for limited movement to raised and lowered positions, said handle being tubular and in its lowered position extending forwardly from said motor, an operating rod within said handle extending lengthwise of the latter into proximity to the angle thereof, a throttle control button secured on the forward end of said rod slidable through the forward end of said handle, yielding means. normally holding said rod and button in forward position with the latter projecting forwardly beyond said handle, and operating connections between the rearward end of said rod and said throttle lever comprising a guide sheath and a flexible member slidable therethrough attached to one end of said rod and slidable at its other end through said throttle lever and there provided with a stop disposed to permit full opening of said valve in the normal position of said button and to pick up said throttle lever and move it in valve closing direction in the rearward movement of said button.

9. In an outboard motor unit, a motor and a carburettor therefor having a throttle valve yieldingly urged in opening direction, a throttle lever for operating said valve, a magneto stator plate movable in either direction about an axis, a control lever connected to said plate for moving the latter, a cam member movable with said plate disposed to contact said throttle lever for closing said valve in the movement of said plate in one direction and to permit opening movement of said valve in the movement of said plate in the opposite direction, said cam member being moved clear of said throttle lever when said plate has been moved a predetermined distance in said opposite direction, a handle bracket attached to said motor, an angular steering handle pivoted adjacent its angle to said bracket for limited movement to raised and lowered positions, said handle being tubular and in its lowered position extend ing forwardly from said motor, an operating rod within said handle extending lengthwise of the latter into proximity to the angle thereof, a throttle control button secured on the forward end of said rod slidable through the forward end of said handle, a bell crank pivotally mounted within said handle having limited forward movement and provided with a forward arm connected to the rearward end of said rod for movement therewith, yielding means normally holding said bell crank in forward position thereby holding said rod and button in forward position with the latter projecting forwardly beyond said handle, said bell crank having a rearward arm extending toward said bracket, and operating connections between said rearward arm and said throttle lever comprising a guide sheath and a flexible member slidable therethrough attached at one end to said rearward arm and slidable at its other end through said throttle lever and there provided with a stop disposed to permit full opening of said valve in the normal position of said button and to pick up said throttle lever and move it in valve closing direction in the rearward movement of said button.

10. In an outboard motor unit, a motor and carburetor therefor having a throttle valve yieldingly urged in opening direction, a magneto plate movable in either direction about an axis, means for moving said plate in either direction, means for moving said valve in closing direction comprising a valve actuating member carried by said plate and free from said valve whereby the latter when open may be moved in closing direction independently of said plate, a steering handle attached to said motor extending forwardly therefrom, a throttle control member on said handle yieldingly held in a normal position and movable therefrom in valve operating direction, and operating connections between said operating member and said valve effective for moving the latter in closing direction responsive to movement of said operating member in valve operating direction, said operating connections comprising a lost motion connection to said valve accommodating operation thereof from full open to full closed position when said control member is in normal position.

GILBERT l1 BUSKE.

REFERENCES CETED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,277,447 Maegly Sept. 3, 1918 1,932,521 Irgens Oct. 31, 1933 2,058,401 Blue Oct. 27, 1936 2,087,669 Johnson July 20, 1937 2,526,946 Hawkins Oct. 24, 1950 

